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Command line interface for libtrain

libtrain is a library for calculating the shortest route
from a train station to another in consideration of time and distance.
It tells you which line you should take and where you should transfer at.

Note that this is a *library*, so you have to get interface programs using
libtrain(gtktrain is recommended) to actually use it.

To use this software, you'll need to get the train schedule data separately
and install it by yourself. See README.Debian for more detail.